- 25 Apr, 2016 5 commits
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Josh Bleecher Snyder authored
As a nice side-effect, this allows us to unify several code paths. The terminology (low, high, max, simple slice expr, full slice expr) is taken from the spec and the examples in the spec. This is a trial run. The plan, probably for Go 1.8, is to change slice expressions to use Node.List instead of OKEY, and to do some similar tree structure changes for other ops. Passes toolstash -cmp. No performance change. all.bash passes with GO_GCFLAGS=-newexport. Updates #15350 Change-Id: Ic1efdc36e79cdb95ae1636e9817a3ac8f83ab1ac Reviewed-on: https://go-review.googlesource.com/22425Reviewed-by:
Matthew Dempsky <mdempsky@google.com>
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Russ Cox authored
Update #15410 Change-Id: Iad3f2639aa7a67b11efc35a629e1893f7d87b957 Reviewed-on: https://go-review.googlesource.com/22430 Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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Alex Brainman authored
Updates #15345 Change-Id: Iae35d3e378cbc8157ba1ff91e4971ed4515a5e5c Reviewed-on: https://go-review.googlesource.com/22394Reviewed-by:
David Crawshaw <crawshaw@golang.org> Run-TryBot: Alex Brainman <alex.brainman@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Josh Bleecher Snyder authored
* Make budget an int32 to avoid needless conversions. * Introduce some temporary variables to reduce repetition. * If ... args are present, they will be the last argument to the function. No need to scan all arguments. Passes toolstash -cmp. Change-Id: I55203609f5d2f25a4e238cd48c63214651120cfc Reviewed-on: https://go-review.googlesource.com/22421 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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Josh Bleecher Snyder authored
Generated with eg: func before(n gc.Nodes) int { return len(n.Slice()) } func after(n gc.Nodes) int { return n.Len() } Change-Id: Ifdf01915e60069166afe96aa7b1d08720bf62fc5 Reviewed-on: https://go-review.googlesource.com/22420 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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- 24 Apr, 2016 9 commits
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Josh Bleecher Snyder authored
This is a follow-up to CLs 19769 and 19770. Change-Id: Ia9b71055613b80df4ce62b34fcc4f479f04f72fd Reviewed-on: https://go-review.googlesource.com/22399 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
David Crawshaw <crawshaw@golang.org>
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Josh Bleecher Snyder authored
Passes toolstash -cmp. Change-Id: I42c962cc5a3ffec2969f223cf238c2fdadbf5857 Reviewed-on: https://go-review.googlesource.com/22381 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Josh Bleecher Snyder authored
Passes toolstash -cmp. Change-Id: I915e76374fd64aa2597e6fa47e4fa95ca00ca643 Reviewed-on: https://go-review.googlesource.com/22380 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
David Crawshaw <crawshaw@golang.org>
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Josh Bleecher Snyder authored
Note that this is only safe because the compiler generates multiple distinct gc.Types. If we switch to having canonical gc.Types, then this will need to be updated to handle the case in which the user uses both map[T]S and also map[[8]T]S. In that case, the runtime needs algs for [8]T, but this could mark the sole [8]T type as Noalg. This is a general problem with having a single bool to represent whether alg generation is needed for a type. Cuts 5k off cmd/go and 22k off golang.org/x/tools/cmd/godoc, approx 0.04% and 0.12% respectively. For #6853 and #9930 Change-Id: I30a15ec72ecb62e2aa053260a7f0f75015fc0ade Reviewed-on: https://go-review.googlesource.com/19769Reviewed-by:
David Crawshaw <crawshaw@golang.org> Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Josh Bleecher Snyder authored
Note that this is only safe because the compiler generates multiple distinct gc.Types. If we switch to having canonical gc.Types, then this will need to be updated to handle the case in which the user uses both map[[n]T]S and also calls a function f(...T) with n arguments. In that case, the runtime needs algs for [n]T, but this could mark the sole [n]T type as Noalg. This is a general problem with having a single bool to represent whether alg generation is needed for a type. Cuts 17k off cmd/go and 13k off golang.org/x/tools/cmd/godoc, approx 0.14% and 0.07% respectively. For #6853 and #9930 Change-Id: Iccb6b9fd88ade5497d7090528a903816d340bf0a Reviewed-on: https://go-review.googlesource.com/19770Reviewed-by:
David Crawshaw <crawshaw@golang.org> Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Keith Randall authored
func f(x, y, z *int) { a := []*int{x,y,z} ... } We used to use: var tmp [3]*int a := tmp[:] a[0] = x a[1] = y a[2] = z Now we do: var tmp [3]*int tmp[0] = x tmp[1] = y tmp[2] = z a := tmp[:] Doesn't sound like a big deal, but the compiler has trouble eliminating write barriers when using the former method because it doesn't know that the slice points to the stack. In the latter method, the compiler knows the array is on the stack and as a result doesn't emit any write barriers. This turns out to be extremely common when building ... args, like for calls fmt.Printf. Makes go binaries ~1% smaller. Doesn't have a measurable effect on the go1 fmt benchmarks, unfortunately. Fixes #14263 Update #6853 Change-Id: I9074a2788ec9e561a75f3b71c119b69f304d6ba2 Reviewed-on: https://go-review.googlesource.com/22395 Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Josh Bleecher Snyder <josharian@gmail.com>
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Dmitry Vyukov authored
Arm arch uses coarse-grained kernel timer as cputicks. As the result sort.Sort smashes trace entirely. Use sort.Stable instead. Change-Id: Idfa017a86a489be58cf239f7fe56d7f4b66b52a9 Reviewed-on: https://go-review.googlesource.com/22317 Run-TryBot: Dmitry Vyukov <dvyukov@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Austin Clements <austin@google.com>
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Dmitry Vyukov authored
On some processors cputicks (used to generate trace timestamps) produce non-monotonic timestamps. It is important that the parser distinguishes logically inconsistent traces (e.g. missing, excessive or misordered events) from broken timestamps. The former is a bug in tracer, the latter is a machine issue. Test that (1) parser does not return a logical error in case of broken timestamps and (2) broken timestamps are eventually detected and reported. Change-Id: Ib4b1eb43ce128b268e754400ed8b5e8def04bd78 Reviewed-on: https://go-review.googlesource.com/21608Reviewed-by:
Austin Clements <austin@google.com>
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Alex Brainman authored
Reloc.SymbolTableIndex is an index into symbol table. But Reloc.SymbolTableIndex cannot be used as index into File.Symbols, because File.Symbols slice has Aux lines removed as it is built. We cannot change the way File.Symbols works, so I propose we introduce new File.COFFSymbols that does not have that limitation. Also unlike File.Symbols, File.COFFSymbols will consist of COFFSymbol. COFFSymbol matches PE COFF specification exactly, and it is simpler to use. Updates #15345 Change-Id: Icbc265853a472529cd6d64a76427b27e5459e373 Reviewed-on: https://go-review.googlesource.com/22336Reviewed-by:
David Crawshaw <crawshaw@golang.org> Run-TryBot: Alex Brainman <alex.brainman@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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- 23 Apr, 2016 5 commits
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Brad Fitzpatrick authored
This is what led to https://golang.org/cl/20763 and https://golang.org/cl/20765 to shrink binary sizes. Change-Id: Id360d474e6153cfe32a525b0a720810fd113195b Reviewed-on: https://go-review.googlesource.com/22392Reviewed-by:
David Crawshaw <crawshaw@golang.org>
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Keith Randall authored
Now that we're using 32-bit ops for 8/16-bit logical operations (to avoid partial register stalls), there's really no need to keep track of the 8/16-bit ops at all. Convert everything we can to 32-bit ops. This CL is the obvious stuff. I might think a bit more about whether we can get rid of weirder stuff like HMULWU. The only downside to this CL is that we lose some information about constants. If we had source like: var a byte = ... a += 128 a += 128 We will convert that to a += 256, when we could get rid of the add altogether. This seems like a fairly unusual scenario and I'm happy with forgoing that optimization. Change-Id: Ia7c1e5203d0d110807da69ed646535194a3efba1 Reviewed-on: https://go-review.googlesource.com/22382Reviewed-by:
Todd Neal <todd@tneal.org>
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Keith Randall authored
Combine stores into larger widths when it is safe to do so. Add clobber() function so stray dead uses do not impede the above rewrites. Fix bug in loads where all intermediate values depending on a small load (not just the load itself) must have no other uses. We really need the small load to be dead after the rewrite.. Fixes #14267 Change-Id: Ib25666cb19777f65082c76238fba51a76beb5d74 Reviewed-on: https://go-review.googlesource.com/22326 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by:
Todd Neal <todd@tneal.org>
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Dmitry Vyukov authored
Currently tracer uses global sequencer and it introduces significant slowdown on parallel machines (up to 10x). Replace the global sequencer with per-goroutine sequencer. If we assign per-goroutine sequence numbers to only 3 types of events (start, unblock and syscall exit), it is enough to restore consistent partial ordering of all events. Even these events don't need sequence numbers all the time (if goroutine starts on the same P where it was unblocked, then start does not need sequence number). The burden of restoring the order is put on trace parser. Details of the algorithm are described in the comments. On http benchmark with GOMAXPROCS=48: no tracing: 5026 ns/op tracing: 27803 ns/op (+453%) with this change: 6369 ns/op (+26%, mostly for traceback) Also trace size is reduced by ~22%. Average event size before: 4.63 bytes/event, after: 3.62 bytes/event. Besides running trace tests, I've also tested with manually broken cputicks (random skew for each event, per-P skew and episodic random skew). In all cases broken timestamps were detected and no test failures. Change-Id: I078bde421ccc386a66f6c2051ab207bcd5613efa Reviewed-on: https://go-review.googlesource.com/21512 Run-TryBot: Dmitry Vyukov <dvyukov@google.com> Reviewed-by:
Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Francesc Campoy authored
Fixes #15413 Change-Id: I837a391276eed565cf66d3715ec68b7b959ce143 Reviewed-on: https://go-review.googlesource.com/22390Reviewed-by:
Andrew Gerrand <adg@golang.org>
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- 22 Apr, 2016 21 commits
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Matthew Dempsky authored
Change-Id: Ia3f262f06592b66447c213e2350402cd5e6e2ccd Reviewed-on: https://go-review.googlesource.com/22389 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Ian Lance Taylor <iant@golang.org>
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Robert Griesemer authored
Exporting filenames as part of the position information can lead to different object files which breaks tests. Change-Id: Ia678ab64293ebf04bf83601e6ba72919d05762a4 Reviewed-on: https://go-review.googlesource.com/22385Reviewed-by:
Matthew Dempsky <mdempsky@google.com>
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Brad Fitzpatrick authored
Change-Id: I12d5e5d0e74b354f26898bab4ea30eb27ac45cd7 Reviewed-on: https://go-review.googlesource.com/22387 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by:
Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Brad Fitzpatrick authored
Fixes #15404 Change-Id: I16f2a34a1e4c3457053a1fc2141f21747cfb22b4 Reviewed-on: https://go-review.googlesource.com/22386Reviewed-by:
Matthew Dempsky <mdempsky@google.com>
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Matthew Dempsky authored
Prevents denial of service attacks from bogus UDP packets. Fixes #13281. Change-Id: Ifb51b17a1b0807bfd27b144d6037431701184e7b Reviewed-on: https://go-review.googlesource.com/22126Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Mohit Agarwal authored
Fixes #14860 Change-Id: Id55ad942d45a104d560a879d6e8e1aa09671789b Reviewed-on: https://go-review.googlesource.com/22351Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Caleb Spare authored
This provides a way to disable the escaping of <, >, and & in JSON strings. Fixes #14749. Change-Id: I1afeb0244455fc8b06c6cce920444532f229555b Reviewed-on: https://go-review.googlesource.com/21796 Run-TryBot: Caleb Spare <cespare@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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Matthew Dempsky authored
Instead of switching on Ctype (which internally uses a type switch) and then scattering lots of type assertions throughout the CTFOO case clauses, just use type switches directly on the underlying constant value. Passes toolstash/buildall. Change-Id: I9bc172cc67e5f391cddc15539907883b4010689e Reviewed-on: https://go-review.googlesource.com/22384 Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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Dmitry Vyukov authored
Change-Id: I037101b1921fe151695d32e9874b50dd64982298 Reviewed-on: https://go-review.googlesource.com/22314Reviewed-by:
Austin Clements <austin@google.com>
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Matthew Dempsky authored
Change-Id: Idab5f603c1743895b8f4edbcc55f7be83419a099 Reviewed-on: https://go-review.googlesource.com/22383 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by:
David Crawshaw <crawshaw@golang.org>
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Ian Lance Taylor authored
CL 22372 changed ppc64le to use normal cgo initialization on ppc64le. Doing this uncovered a cmd/link error using internal linking. Opened issue 15409 for the problem. This CL disables the test. Update #15409. Change-Id: Ia1bb6b874c1b5a4df1a0436c8841c145142c30f7 Reviewed-on: https://go-review.googlesource.com/22379 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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Dmitry Vyukov authored
Generate new protobuf pprof profiles with embed symbol info. This makes program binary unnecessary. Change-Id: Ie628439c13c5e34199782031138102c83ea50621 Reviewed-on: https://go-review.googlesource.com/21873Reviewed-by:
Hyang-Ah Hana Kim <hyangah@gmail.com> Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
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David Chase authored
Replaced incorrect recursion-free rendering of DFS with something that was correct. Enhanced test with all permutations of IF successors to ensure that all possible DFS traversals are exercised. Test is improved version of https://go-review.googlesource.com/#/c/22334 Update 15084. Change-Id: I6e944c41244e47fe5f568dfc2b360ff93b94079e Reviewed-on: https://go-review.googlesource.com/22347Reviewed-by:
Keith Randall <khr@golang.org> Run-TryBot: David Chase <drchase@google.com>
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Michael Munday authored
This reverses the change to this benchmark made in 9b6bf20a. Change-Id: I79ab88286c3028d3be561957140375bbc413e7ab Reviewed-on: https://go-review.googlesource.com/22340 Run-TryBot: Michael Munday <munday@ca.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Minux Ma <minux@golang.org>
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Chris Zou authored
The input buffer is aligned to a doubleword boundary to improve performance of the vector instructions. The pure Go implementation is used to align the input data, and is also used when the vector instructions are not available or the data length is less than 64 bytes. Change-Id: Ie259a5f2f1562bcc17961c99e5776c99091d6bed Reviewed-on: https://go-review.googlesource.com/22201Reviewed-by:
Michael Munday <munday@ca.ibm.com> Run-TryBot: Michael Munday <munday@ca.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Bill O'Farrell <billotosyr@gmail.com> Reviewed-by:
Brad Fitzpatrick <bradfitz@golang.org>
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Alexandru Moșoi authored
Remove the "optimization" that was causing the issue. For the following code the "optimization" was converting v to (OpCopy x) which is wrong because x doesn't dominate v. b1: y = ... First .. b3 b2: x = ... Goto b3 b3: v = phi x y ... use v ... That "optimization" is likely no longer needed because we now have a second opt pass with a dce in between which removes blocks of type First. For pkg/tools/linux_amd64/* the binary size drops from 82142886 to 82060034. Change-Id: I10428abbd8b32c5ca66fec3da2e6f3686dddbe31 Reviewed-on: https://go-review.googlesource.com/22312 Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Keith Randall <khr@golang.org>
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Alexandru Moșoi authored
See discussion at [1]. True value must have a fixed non-zero representation meaning that a && b can be implemented as a & b. [1] https://groups.google.com/forum/#!topic/golang-dev/xV0vPuFP9Vg This change helps with m := a && b, but it's more common to see if a && b { do something } which is not handled. Change-Id: Ib6f9ff898a0a8c05d12466e2464e4fe781035394 Reviewed-on: https://go-review.googlesource.com/22313 Run-TryBot: Alexandru Moșoi <alexandru@mosoi.ro> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Keith Randall <khr@golang.org>
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Keith Randall authored
They are guaranteed to be non-nil, no point in inserting nil checks for them. Fixes #15390 Change-Id: I3b9a0f2319affc2139dcc446d0a56c6785ae5a86 Reviewed-on: https://go-review.googlesource.com/22291Reviewed-by:
Josh Bleecher Snyder <josharian@gmail.com>
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Ian Lance Taylor authored
The special case was because PPC did not support external linking, but now it does. Fixes #10410. Change-Id: I9b024686e0f03da7a44c1c59b41c529802f16ab0 Reviewed-on: https://go-review.googlesource.com/22372 Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by:
David Crawshaw <crawshaw@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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David Crawshaw authored
linux/amd64 PIE: cmd/go: -62KB (0.5%) jujud: -550KB (0.7%) For #6853. Change-Id: Ieb67982abce5832e24b997506f0ae7108f747108 Reviewed-on: https://go-review.googlesource.com/22371 Run-TryBot: David Crawshaw <crawshaw@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by:
Ian Lance Taylor <iant@golang.org>
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David Crawshaw authored
linux/amd64: cmd/go: -8KB (basically nothing) linux/amd64 PIE: cmd/go: -191KB (1.6%) jujud: -1.5MB (1.9%) Updates #6853 Fixes #15064 Change-Id: I0adbb95685e28be92e8548741df0e11daa0a9b5f Reviewed-on: https://go-review.googlesource.com/21777Reviewed-by:
Ian Lance Taylor <iant@golang.org>
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